<?xml version="1.0" encoding="utf-8"?>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Dropping image on horizontal scrollbar of a scrollable block element</title>
<style type="text/css">
div[ondragenter]
	{width:3em;
	height:3em;
	margin-top:1em;
	font-size:1.5em;
	white-space:nowrap;
	overflow-x:scroll;}
p:first-child
	{padding-left:1em;}
img
	{width:5px;
	height:5px;}
</style>
<script type="application/ecmascript">
function checkImage(event)
	{document.querySelector('div').firstChild.nodeValue = (document.querySelector('img').getAttribute('src') == event.dataTransfer.getData('text/uri-list').replace(/\r\n$/,''))?'PASS':'FAIL';}
</script>
</head>
<body>
<p><img src="" alt="PNG green pixel" ondragstart="event.dataTransfer.effectAllowed = 'copy'"/></p>
<p>Drag little square above and drop it on scrollbar below. You should see word PASS when you drop it on scrollbar.</p>
<div ondragenter="event.preventDefault()" ondragover="return false" ondrop="checkImage(event)">↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓</div>
</body>
</html>